<template>
    <div class="app-container">

        <div :class="['table','table-full']">
            <div class="table-container">
                <el-table :key="tableKey" v-loading="listLoading" height="100%" :data="list" border fit highlight-current-row
                    style="width: 100%;" @sort-change="sortChange">
                    <el-table-column label="ID" prop="id" sortable="custom" align="center" width="80" :class-name="getSortClass('id')">
                        <template slot-scope="{row}">
                            <span>{{ row.id }}</span>
                        </template>
                    </el-table-column>
                    <el-table-column label="日期" width="150px" align="center">
                        <template slot-scope="{row}">
                            <span>{{ row.timestamp | parseTime('{y}-{m}-{d} {h}:{i}') }}</span>
                        </template>
                    </el-table-column>
                    <el-table-column label="标题" min-width="150px">
                        <template slot-scope="{row}">
                            <span class="link-type" @click="handleUpdate(row)">{{ row.title }}</span>
                            <el-tag>{{ row.type | typeFilter }}</el-tag>
                        </template>
                    </el-table-column>
                    <el-table-column label="作者" width="110px" align="center">
                        <template slot-scope="{row}">
                            <span>{{ row.author }}</span>
                        </template>
                    </el-table-column>
                    <el-table-column label="Imp" width="80px">
                        <template slot-scope="{row}">
                            <svg-icon v-for="n in + row.importance" :key="n" icon-class="star" class="meta-item__icon" />
                        </template>
                    </el-table-column>

                    <el-table-column label="状态" class-name="status-col" width="100">
                        <template slot-scope="{row}">
                            <el-tag :type="row.status | statusFilter">
                                {{ row.status }}
                            </el-tag>
                        </template>
                    </el-table-column>
                </el-table>
            </div>
        </div>

        <pagination v-show="total>0" :total="total" :page.sync="listQuery.page" :limit.sync="listQuery.limit" @pagination="getList" />

        <el-dialog :title="textMap[dialogStatus]" :visible.sync="dialogFormVisible">
            <el-form ref="dataForm" :rules="rules" :model="temp" label-position="left" label-width="70px"
                style="width: 400px; margin-left:50px;">
                <el-form-item label="Type" prop="type">
                    <el-select v-model="temp.type" class="filter-item" placeholder="Please select">
                        <el-option v-for="item in calendarTypeOptions" :key="item.key" :label="item.display_name" :value="item.key" />
                    </el-select>
                </el-form-item>
                <el-form-item label="Date" prop="timestamp">
                    <el-date-picker v-model="temp.timestamp" type="datetime" placeholder="Please pick a date" />
                </el-form-item>
                <el-form-item label="Title" prop="title">
                    <el-input v-model="temp.title" />
                </el-form-item>
                <el-form-item label="Status">
                    <el-select v-model="temp.status" class="filter-item" placeholder="Please select">
                        <el-option v-for="item in statusOptions" :key="item" :label="item" :value="item" />
                    </el-select>
                </el-form-item>
                <el-form-item label="Imp">
                    <el-rate v-model="temp.importance" :colors="['#99A9BF', '#F7BA2A', '#FF9900']" :max="3" style="margin-top:8px;" />
                </el-form-item>
                <el-form-item label="Remark">
                    <el-input v-model="temp.remark" :autosize="{ minRows: 2, maxRows: 4}" type="textarea" placeholder="Please input" />
                </el-form-item>
            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button @click="dialogFormVisible = false">
                    取消
                </el-button>
                <el-button type="primary" @click="dialogStatus==='create'?createData():updateData()">
                    确认
                </el-button>
            </div>
        </el-dialog>

    </div>
</template>

<script>
import { fetchList, updateArticle } from '@/api/article'
import Pagination from '@/components/Pagination' // secondary package based on el-pagination 分页组件

const calendarTypeOptions = [
    { key: 'CN', display_name: 'China' },
    { key: 'US', display_name: 'USA' },
    { key: 'JP', display_name: 'Japan' },
    { key: 'EU', display_name: 'Eurozone' }
]

// arr to obj, such as { CN : "China", US : "USA" }
const calendarTypeKeyValue = calendarTypeOptions.reduce((acc, cur) => {
    acc[cur.key] = cur.display_name
    return acc
}, {})

export default {
    name: 'LayoutTable',
    components: { Pagination },
    directives: {}, // 指令
    // 过滤 {{row.status | statusFilte}}
    // html代码中，{{}}中实现filters顺序是 {{参数 | filters函数 | filters函数 | ...}}
    // 后面可以多个filters函数，前面filters函数return的结果是后面filters函数的参数。
    // 并且可以在过滤函数后面加上（）里面加上其他的参数。如 filterTwo('同学')
    filters: {
        statusFilter (status) {
            const statusMap = {
                published: 'success',
                draft: 'info',
                deleted: 'danger'
            }
            return statusMap[status]
        },
        typeFilter (type) {
            return calendarTypeKeyValue[type]
        }
    },
    data () {
        return {
            // 筛选框的 form 表单
            form: {
                importance: undefined,
                title: undefined,
                type: undefined,
                sort: '+id'
            },
            rules: { // 表单验证
                type: [{ required: true, message: 'type is required', trigger: 'change' }],
                timestamp: [{ type: 'date', required: true, message: 'timestamp is required', trigger: 'change' }],
                title: [{ required: true, message: 'title is required', trigger: 'blur' }]
            },
            tableKey: 0,
            list: null, // 表格数据
            total: 0, // 总条数
            listLoading: true, // 表格加载数据时的 loading
            listQuery: { // 表格当前页 和 当前页的展示数量
                page: 1,
                limit: 20
            },
            temp: { // 新增和修改弹框 的 form 表单
                id: undefined,
                importance: 1,
                remark: '',
                timestamp: new Date(),
                title: '',
                type: '',
                status: 'published'
            },
            dialogFormVisible: false, // 弹框展示隐藏
            dialogStatus: '', // 弹框新增或者修改
            textMap: { // 弹框的标题
                update: '编辑',
                create: '新增'
            },
            // dialogPvVisible: false, //阅读量弹框
            // pvData: [], //阅读量弹框里面的表格数据
            downloadLoading: false // 导出按钮 的 loading
        }
    },
    created () {
        this.getList()
    },
    methods: {
        // 获取表格数据
        getList () {
            this.listLoading = true
            fetchList(this.listQuery).then(response => {
                this.list = response.data.items
                this.total = response.data.total
                // Just to simulate the time of the request
                setTimeout(() => {
                    this.listLoading = false
                }, 1.5 * 1000)
            })
        },
        // 重新获取表格数据 页码归为1
        handleFilter () {
            this.listQuery.page = 1
            this.getList()
        },
        // 排序
        sortChange (data) {
            console.log(data)
            const { prop, order } = data
            if (prop === 'id') {
                this.sortByID(order)
            }
        },
        sortByID (order) {
            if (order === 'ascending') {
                this.listQuery.sort = '+id'
            } else {
                this.listQuery.sort = '-id'
            }
            // 想参数中添加 排序方式后 再次向后台请求
            this.handleFilter()
        },
        // 修改 -- 打开弹框
        handleUpdate (row) {
            this.temp = Object.assign({}, row) // 拷贝对象
            this.temp.timestamp = new Date(this.temp.timestamp)
            this.dialogStatus = 'update'
            this.dialogFormVisible = true
            this.$nextTick(() => {
                this.$refs['dataForm'].clearValidate()
            })
        },
        // 修改 -- 提交表单
        updateData () {
            this.$refs['dataForm'].validate((valid) => {
                if (valid) {
                    const tempData = Object.assign({}, this.temp)
                    tempData.timestamp = +new Date(tempData.timestamp) // change Thu Nov 30 2017 16:41:05 GMT+0800 (CST) to 1512031311464
                    updateArticle(tempData).then(() => {
                        const index = this.list.findIndex(v => v.id === this.temp.id)
                        this.list.splice(index, 1, this.temp)
                        this.dialogFormVisible = false
                        this.$notify({
                            title: 'Success',
                            message: 'Update Successfully',
                            type: 'success',
                            duration: 2000
                        })
                    })
                }
            })
        },
        getSortClass: function (key) {
            const sort = this.listQuery.sort
            return sort === `+${key}` ? 'ascending' : 'descending'
        }
    }
}
</script>
<style lang="scss" scoped>
</style>
